Adding "mass" to generators

[JajajTec]

TL;DR

If you have a strongly fluctuating power consumption that the generators do not go on / off / on / off

What ?

here you see a very elyptical power consumption.
The generators turn on/of instantly.
What my idea is:
Every generator (kenetic) has a startup delay and is slowly shut down
this will affect the grid so you must put some batterys in to snothe out these spikes
how fast it is acting depends on the building.
Like a steam engine needs 10 seconds to start up (0% to 100%) and it needs like 14 seconds to shut down (100% to 0%).

Why ?

Cause it is more realistic and it wount sound so stupid when you hear your steam engines just jump.